<template>
  <div class="todo-footer">
    <label>
      <input type="checkbox" :checked="checkedChange" @click="AllChangebox"/>
    </label>
    <span>
      <span
        >已完成{{
          todoList.reduce((p, c) => {
            return c.node ? p + 1 : p;
          }, 0)
        }}</span
      >
      / 全部{{ todoList.length }}
    </span>
    <button class="btn btn-danger" @click="ClearAllOver">清除已完成任务</button>
  </div>
</template>

<script>
export default {
  name: "Footer",
  props: ["todoList","singleAllHandlell","ClearAllOver"],  
  computed:{
    //计算属性 当都选的时候可以则全选
    checkedChange(){
        return this.todoList.every(item=>item.node)&&this.todoList.length !== 0
    }
  },
  methods: {
    AllChangebox(e){
        this.singleAllHandlell(e.target.checked)
    },
  },
};
</script>

<style>
/*footer*/
.todo-footer {
  height: 40px;
  line-height: 40px;
  padding-left: 6px;
  margin-top: 5px;
}

.todo-footer label {
  display: inline-block;
  margin-right: 20px;
  cursor: pointer;
}

.todo-footer label input {
  position: relative;
  top: -1px;
  vertical-align: middle;
  margin-right: 5px;
}

.todo-footer button {
  float: right;
  margin-top: 5px;
}
</style>